Waterway Company is constructing a building. Construction began on February 1 and was completed on December 31. Expenditures were $2,016,000 on March 1, $1,296,000 on June 1, and $3,041,650 on December 31. Waterway Company borrowed $1,115,400 on March 1 on a 5-year, 13% note to help finance construction of the building. In addition, the company had outstanding all year a 9%, 5-year, $2,469,300 note payable and an 10%, 4-year, $3,155,500 note payable. Compute the weighted-average interest rate used for interest capitalization purposes. (Round answer to 2 decimal places, e.g. 7.58%.) Weighted-average interest rate do %